<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-page-3/#margin-dimension">
<meta name="assert" content="Test auto margins. Auto margins not adjacent to a page edge are treated as 0.">
<link rel="match" href="auto-margins-001-print-ref.html">
<style>
  @page {
    margin: 100px;
    size: 500px 400px;
    border: solid;
    @top-left-corner {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @top-left {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @top-center {
      border: solid;
      height: 25px;
      margin: auto;
      content: "";
    }
    @top-right {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @top-right-corner {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @right-top {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @right-middle {
      border: solid;
      width: 25px;
      margin: auto;
      content: "";
    }
    @right-bottom {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @bottom-right-corner {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @bottom-right {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @bottom-center {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @bottom-left {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @bottom-left-corner {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @left-bottom {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @left-middle {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
    @left-top {
      border: solid;
      width: 25px;
      height: 25px;
      margin: auto;
      content: "";
    }
  }
</style>

There should be 16 margin boxes around this page area. They should all be
squares, except for the center box at the top and the middle box on the right
hand side, which should take up all available main-axis space. All 16 boxes
should all be centered within their available cross-axis space.
